i like the adventure game aspects for opening/closing the gates for example, you could add even more of these riddles

some ideas:
- is it possible to disable the manual production of certain items? so for example you need to go deeper into the labs to find assembling machines that produce these items
- is it possible to disable labs/research and make the technology available when you discover certain areas in the map?

Creative Mode don't work on Factorio 0.18.27 so i can't rly work on Map without this Mod....
However Labolatory have some more Stuff like:

1) Power Control Rooms
- Each labolatory will have its own Power Control Room
in order to enable all main lights in labolatory You have to get acces to Power Room and enable power for your Labolatory

First Labolatory have free acces to Power Control Room, other Lab-s will have some defense systems ( biters or labs by thier own )

2) More Caves with resources ( but there is no connection between caves yet )
3) Immortal Mutant Biters ( Special biters that u can only run from - can't be killed ) || or u can lock them in special lockers ...
4) Thanks to Heat Interface im working on Nuclear Reactor that dont require Nuclear Cells
5) You can play as Pirate ^_^
- its still WIP idea and im testing it on other Map
but idea is to create Trains that visit Labolatories from time to time, you can force them to stop and stole items inside thier wagons

but im not sure about stop system
maybe they JUST stop and you can steal items

I might base some of the things you included in your map on the new version of nauvis post collapse. Ive been thinking of making a underground section for my map which is something ive always wanted to do and if I were to do it I would try to make it look like what you made!